engine YAMAHA GRIZZLY 125 2004 User Guide

4-11
EBU00063
Throttle lever
Once the engine is running, movement of the
throttle lever will increase the engine speed.
Regulate the speed of the machine by varying
the throttle position. Because the throttle is
spring-loaded, the machine will decelerate, and
the engine will return to an idle any time the
hand is removed from the throttle lever.
Before starting the engine, check the throttle to
be sure it is operating smoothly. Make sure it
returns to the idle position as soon as the lever
is released.
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Malfunction of the throttle could make it diffi-
cult to speed up or slow down when you
need to. This could cause an accident.
Check the operation of the throttle lever
before you start the engine. If the throttle
does not work smoothly, check for the
cause. Correct the problem before riding the
ATV or consult a Yamaha dealer.
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1. Throttle lever1. Levier d’accélérateur1. Palanca del aceleración
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4-13
EBU11980
Speed limiter
The speed limiter keeps the throttle from fully
opening, even when the throttle lever is pushed
to the maximum. Turning in the adjusting screw
limits the maximum engine power available and
decreases the maximum speed of the ATV.
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Improper adjustment of the speed limiter and
throttle could cause throttle cable damage or
improper throttle operation. You could lose
control, have an accident or be injured. Do
not turn the adjusting screw out more than
12 mm or the throttle cable could be dam-
aged. Always make sure the throttle lever
free play is adjusted to 3.0–5.0 mm. See page
8-45.
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1. Adjusting screw 2. Locknut
a. No more than 12 mm
1. Vis de réglage 2. Contre-écrou
a. Pas plus que 12 mm
1. Tornillo de ajuste 2. Contratuerca
a. No más de 12 mm
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4-17
EBU00075
Parking brake
Use the parking brake when you have to start
the engine or park the machine, especially on a
slope. Apply the rear brake lever and push down
the lock plate to apply the parking brake.
Squeeze the rear brake lever to release the
parking brake.
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8Always set the parking brake before start-
ing the engine. The ATV could start mov-
ing unexpectedly if the parking brake is
not applied. This could cause loss of con-
trol or a collision.
8Always be sure you have released the
parking brake before you begin to ride.
The brake could overheat if you ride the
ATV without releasing the parking brake.
You could lose braking performance
which could cause an accident. You could
also wear out the brakes prematurely.
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1. Lock plate1. Frein d’écrou1. Placa de bloqueo
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4-21
EBU00093
Fuel cock
The fuel cock supplies fuel from the fuel tank to
the carburetor.
The fuel cock has three positions.
OFF: With the lever in this position fuel will not
flow. Always turn the lever to this position
when the engine is not running.
ON: With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
RES: This indicates reserve. If you run out of
fuel while riding, turn the lever to this
position. THEN FILL THE FUEL TANK
AT THE FIRST OPPORTUNITY. After
refuelling, return the fuel cock lever to the
“ON” position.RES
OFF
ON
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4-23
EBU00094
Starter (choke)
Starting a cold engine requires a richer air-fuel
mixture. A separate starter circuit supplies this
mixture.
Move in direction ato turn on the starter
(choke).
Move in direction bto turn off the starter
(choke).
Refer to “Starting a cold engine” for proper oper-
ation. (See page 6-3.)
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abA
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1. Fully open 2. Half open
3. Closed A. Starter (choke)
1. Plein course 2. Mi-course
3. Fermé A. Starter (choke)
1. Abre completamente 2. Semiabierto
3. Cerrado A. Starter (choke)
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5-1
EBU00113
PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Brakes• Check operation, condition and free play. 5-5 – 5-7,
• Adjust if necessary. 8-47 – 8-59
Fuel • Check fuel level.
• Fill with fuel if necessary.5-7 – 5-11
Engine oil and• Check oil level. 5-11 – 5-15,
final transmission oil• Fill with oil if necessary. 8-13 – 8-25
Drive chain• Check chain slack and condition.
5-15, 8-61 – 8-69
• Adjust if necessary.
Throttle• Check for proper throttle cable operation. 5-15
Wheels and tires• Check tire pressure, wear and damage. 5-19 – 5-25, 8-75
Fittings and fasteners• Check all fittings and fasteners. 5-15
Battery• Check fluid level.
5-17, 8-77 – 8-83
• Fill with distilled water if necessary.
Lights and switches• Check for proper operation. 5-17, 8-87 – 8-93
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5-9
NOTE:
(for Europe only)
If knocking or pinging occurs, use a different
brand of gasoline or higher octane grade.
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Use only unleaded gasoline. The use of lead-
ed gasoline will cause severe damage to
internal engine parts, such as the valves and
piston rings, as well as to the exhaust sys-
tem.
Recommended fuel:
Unleaded gasoline only
For Europe: Regular unleaded gasoline
only with a research octane number of
91 or higher
Fuel tank capacity:
Total: 7.6 L
Reserve: 1.3 L
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5-11
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8Do not overfill the fuel tank. Fuel expands
when it heats up. If the fuel tank is over-
filled, fuel could spill out due to heat from
the engine or the sun.
8Be careful not to spill fuel, especially on
the engine or exhaust pipe which can
cause a fire and severe injury. Wipe up
any spilled fuel immediately.
8Do not refuel right after the engine has
been running and is still very hot.
8Be sure the fuel tank cap is closed secure-
ly.
EBU11163
Engine and final transmission oil
Make sure the engine and final transmission oil
is at the specified level. Add oil as necessary.
(See page 8-13–8-25.)
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5-13
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8Do not use oils with a diesel specification
of “CD” or oils of a higher quality than
specified. In addition, do not use oils
labeled “ENERGY CONSERVING II” or
higher.
8Be sure no foreign material enters the
crankcase.
Recommended engine oil type and quantity:
See page 10-2.
Recommended final transmission oil type
and quantity:
See page 10-2.
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6-3
EBU00510
Starting a cold engine
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Always make sure all control cables work
smoothly before you begin riding in cold
weather. If the control cables are frozen or
do not work smoothly, you could be unable
to control the ATV, which could lead to an
accident or collision.
1. Set the parking brake.
2. Turn the fuel cock to “ON”.
3. Turn the main switch to “ON” and the engine
stop switch to “RUN”.
4. Shift the drive select lever to neutral.
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